Street Fighter 4 series producer, Yoshinori Ono, pushed hard to get Rainbow Mika into SSF4, but the game's director didn't follow through on his request according to the MTV Multiplayer Blog.

I'm a big Rainbow Mika fan, I don't know if you remember her. So I wanted to put her in 'Street Fighter 4' and I really wanted to put her in 'Super,' so I basically harassed the director constantly, just whispering in his ear, 'Rainbow Mika! Rainbow Mika!' Unfortunately he didn't listen but maybe next time I'll continue my whisper campaign, we'll see what happens.

We know from past interviews that Ono also wanted Rolento in the game, but he didn't make the final roster this time around.

It's worth noting this because the perception from some fans has been that if Ono wanted something in the game, it was going to happen, but we can see from this and other media clips that there's still a number of people ideas have to go through before they get the greenlight.